Instrument for stopping teeth.



110,815,040. 1 V PATENTBD MAR.13, 1906."

P. F. RUTTERFORD.

INSTRUMENT FOR STOPPING TEETH. 'Arruouron .PILED MAE. e. 1905.

" nnrrnnsrnrm "PATENT OFFICE.

PERCY FREDERICK RUTTERFORD, OF LONDON, ENGLAND.

' INSTRUMENT FOR STOPPING TEETl-l.

Specification of Letters Patent. Application filed March 6,1905. Serial No. 248,603-

I Patented March 13, 1906.

ampleinto the cavity of t e tooth which it 'is desired to stop.

The object of my present invention is to produce an instrument for the urposeof facilitating the operation which s all be simple in construction and easy to manipulate.

In the accompanying sheet of drawings, Figure 1 is an elevation, Fig. 2 a longitudinal section, and Fig. 3 a view taken on a plane at rightangles to Figs. 1 and 2, of an instrument made in accordance with my invention, and Fig. 4 shows the same in section, but as in actual use when placing a piece of stopping in a cavity of a tooth. Figs. 5 and 6 are views similar to Figs. 1 and 2 of a modified arrangement; Fig. 7, a detail of part of Figs. 5 and 6, and Figs. 8 and 9 further .modifications. The whole of the figures are drawn to an enlarged scale for the sake of clearness.

a is a piece of india-rubber or other suitable elastic and flexible material made in the shape of a hollow cup adapted to contain within itthe piece of stopping I) intended to be placed in t e cavity of the tooth. The interior of this cup may be ribbed or roughened or-provided with small rojections or recesses for the purpose of asslsting the retention of the stopping material therein. The cup a is fixed to a handle 0, which may be made of steel or any other suitable materiaL. The

lower part d of the'piece of material in which the cup at is formed is preferably shaped as shown in Figs. 1 and 2, so that it may be used for pressing the stopping into the cavity.

' The instrument is usedin.the following way: The piece of stopping b to be put into a cavity is placed in the cup 01., as shown in Fig. 1. The cup a, with the stopping 6, is then conveyed by the handle 0 into the mouth of the patient and the stopping I; brought opposite the cavity to be stopped, (e in Fig. 4'.)

The cup a is now pressed by the handle 0 against the tooth, and as the lip or edge of the cup a is elastic and flexible it is pressed I aside and the stopping b is pushed out from the cup into the cavity, as shown in Fig. 4..

' The part d of the piece containing thecup can then be used for pressing the stopping home into the tooth and completing the operation, or the ordinary well-known instruments may be used for finishing the stopping.

In the arrangement shown inFigs. 1 to 4 the piece a d is fixed to the handle 0 by being molded round the roughened orsplayedout end of the. latter and then vulcanized while in that position; but inasmuch as the cup at and the resser (1 must be made of comparatively so t rubber, in which the handle would not have a good firm hold, it is necessary to make the part f in which the handle is fixed of hard rubber, as shown in Fig. 2, for exam le. The manufacture of the instrument in t at way with two kinds of rubber is somewhatexpensive, and in order to produce a cheaper article the modification shown in Figs. 5, 6,

and 7may be employed. In this latter arrangement the cup at and presser d are made of one quality of rubber of the required softness and the handle 0 is made'with a ring 9 at its end through which the piece a d is passed, as shown in Figs. 5 and 6, and is prevented from falling out by the ring 9 taking into a groove or recess surrounding the piece a d, as shown.

If preferred, the presser (1 may be omitted, the handle 0 being connected to the bottom of the cup a by a screw it passing throu h the bottom of the latter and tapped into t e handle '0, as shown in Fig. 8, or any other suitable means may be employed for securing the cup a to the handle 0. I

Fig. 9 illustrates another method of attaching the cup at and press'er d to the handle 0, in which a ring 9 may be formed separately of a iece of German-silver or other suitable 5 for pressing the stopping material into the In testimony whereof I have signed my cavity, substantially as described. name to this specification in the presence of 10 2. Anfinstfi'unent for stopping teeth (pontwo subscribing Witnesses.

sistin o a ea com risin at one en an x x 1 H elastig flexible cup an% at %he other end a PERCY FREDERICK R'Urluwmm' presser and a handle connected to said head WVitnesses:

between the ends thereof and extending at SPENCER SHOTTER THOMAS,

right angles to said head. AXEL CAMILLO EITZENv 

